Benzofurans - toxicity, Air Pollutants - analysis, Air Pollution - statistics & numerical data, Bromine Compounds - analysis, Polymers - analysis, Environmental Monitoring, Polychlorinated Dibenzodioxins - analysis, Risk Assessment, Humans, Bromine Compounds - toxicity, China - epidemiology, Halogenated Diphenyl Ethers - analysis, Halogenated Diphenyl Ethers...